Compressed-spring machine



June 10, 1930. rr j 1 1,762,747

COMPRESSED SPRING MACHINE Filed Oct. 23, 1928 0 "VV 9 l INVENTOR Ally/9w51m:

Patented June 10, 1930 PATENT OFFICE ANDREW E. SMITH, OF SEATTLE,WASHINGTON COMPRESSED-SPRING MACHINE a pucauon'fiiea October 23, 1928.Serial No. 314,526.

The invention is a machine for making springs which is adaptable tocompress the spring after it is wound and hold it while upon a mandrelwhich may be removed from the machine so that a casing may be placedover it to hold the spring in the compressed state before it is releasedby the holding means of the mandrel.

The object of the invention is to provide a machine formaking springswhich is adaptable to hold the spring in a compressed position until acover which is adaptable to hold it in the compressed position is placedover it. I I

Another object of the invention is to provide a machine for makingsprings in which the spring material is evenly fed to the mandrel of themachine.

Another object of the invention is to provide means within a mandrel forcompressing a spring from'both ends while the spring is on the mandrel.

' A further object of the invention isto provide a mandrel for a springwinding machine which may readily be removed.

And a still further object of the invention is to provide a springwinding machine which is of a simple and economical construction. p

With these ends in view the invention embodies a mandrel, rollerspositioned below the mandrel and on each side of the center, meshinggears at the ends of the mandrel and rollers, a feeding device, meansfor movingthe feeding device, and means in the mandrel for compressingand holding a spring thereon.

Other features and advantages of the invention will appear from thefollowing description taken in connection-with the draw-- ings, wherein:

Figure 1 is a side elevation of the machine with parts broken away;

Figure 2 is a cross-section through the mandrel and rollers on line 22of Figure 1;

Figure 3 is a detail-showing the mandrel removed from the machine and acanvas covering placed over the spring;

in'Figure 6. from the top downward to the point l as Figure 4; is an endelevation showing the arrangement of the operating gears;

Figure 5 is a detail showing the removable tipson the ends of one of theclamping members; and

Figure 6 is a detail showing the remov able socket at the ends of themandrel.

In the drawings the device is shown as it would be made, wherein numeral1 inclicates the mandrel, numeral 2 the base, and numeral 3 a springthat may be made upon the mandrel.

The mandrel 1 is made of a cylindrical shaped piece of material withslots 4 and 5 in its outer surface and adjacent the ends, and each endis provided with a tongue 6 as shown in Figure 6 which extends intogroove 7 in a member 8. The member 8 is mounted in a bearing member 9which is held in the end members 10 and 11 ofthe frame, and it will beobserved that the upper portion ofthe bearing 9 is omitted from theinner end 12 thereof to the point 13 as shown This open portion extendsshown in Figure 2 so that when the mandrel is in'the position with thelarger end of the tongue 6 upward it may be removed from the top of themachine, however, when the larger end of the tongue is downward ortoward either side the wall of the bearing 9 will hold the tongue inplace. It will also be observed that the tongue 6 and the slot 7 aretapered as indicated by the dotted lines shown in Figure 2. The bearings9 are located at each end of the machine so that the mandrel isrotatably held at each end and although this type of bearing is shown itis understood that a bearing of any other suitable type may be used.

In the center of the mandrel is a shaft 15 having right-hand threads asindicated by the numeral 16 adjacent one end and lefthand threads asindicated by the numeral 17 adjacent the other end and on these holdsone "end of the spring and the ends of mandrel with themandrel out ofthe ma chine. The members 21 may be held in the member 19 by ,anysuitable means, however,

in the design shown they are provided with tapered circular portions 22that are held in sockets 23 as shown in Figures 2and' 5; It;

will therefore be observed that these'members may readily beplaced'through the slots 5 with the members 22 placed in the sockets 23and the compression of the spring against" the sur'face 24' will wedgethe members221 into'the-sockets and rigidly hold them in :place.One'end' of therod15 is'..journa led. within the end or the mandrel asindicated by the'numeral' 25 and the opposite end. which isalsojournaled in the mandrel eX- tends 'beyond'the' end of the mandrelas indicated by the numeral '26. A crank 27 may'be place'd'fupon theend26 of therod 15 and in theidesign shown the end ofthe rod is'squaredandQthe crank is provided with a square-"hole sothat the 7 rodmay readily be turnedby the crank. The inner surfacebf the hub of thecrank is also provided with teeth :28 which are adaptable to engagesimilar teeth 29 onithe" outer. facefof 'the member 8' so "that'the'crank'may. be movedfinward: until the teeth engage when it is desiredto rotatepthe'mandrel It is also understoodthatthe 'mandrelmay berotated 'by 'any othersuitablelmeans and a motor'Qoi"apulley may bepi'o'vided'j. The

member S'jatj the'end of the mandrel is also providedwith a gear 30which meshes with. gears 31 and 32 upon rollers 33and 34 which arerotatably' mounted in the end, members 10 and 11" 'ofithefraine anditwillflbe ob! served that as the mandrel is rotated the gears willrotatQt-he, lower rollers. A

A f eding-device 35, having a 'threadedhub 36 is mounted upon a threadedrodv 37 so that asthe rod is rotated the membe rz will move' fromoneen'd to, the other-'ofthe ma ber 35jis piioi' ided -with an opening37' through which the spring wire? jbe i'ed and the lower end ofthememberi is provided with a opening 38. thatis may be'made in theconstruction withoutde parting fronithei spiritof the invention,-one

of which chahge mayb in:the general de- '.rotate the rod 15 slidable ona bar 39. The screw ,87, is rotatably mounted in the end"members 10"andll and oneend of.

the screw is, provided with a gear. 40 which I mandrel, clamping screw37 andmove the member35 tofeedthe spring wire.

sign or arrangement of the machine, another may be inthe use ofother'means for removmeans for operating the machine.

,The constraction will be;readily i1nderstood from the foregoingdescription.

bleda'as shown and'the end of the wire held in the member 20. Themandrelmay then be rotated by the crank or any other suitable means andas it isrotated the spring material'will be fed through the 'member 35 will bemoved backward so that it will only. and as it is turnedthe meme.

end of the tongue 6 is at the top sothat it To I use the'device themachine may be assemto the mandrel andwhen a spring. of a suit- Iablelengthfhas been, formed the crank; 27"

bers 1 8 and 19 will move toward each other and compress and hold thespring. The mandrel may then be rotated until the-large g may readily beremoved. Acanvascover-j mg may then be placed-over the. spring asindicated by the numeral 41 andv the canvas maybe sewed and held byawire or cord as: indicated by the numeral 42, When {this covering issecured to the spring the rod...

15 may then be rotated so that the members j 18 and 19 will move awayfrom thege'ndsof the spring and then the members 21 maybe removed fromthe member 19 so that the spring may be removed fromthe end of the.-

mandrel. the device It will; therefore beobserved v i may be used formak ing a spring -5 and also holding it'until afcovering isiplac'ed 2;over it to hold it in the compressed statebe fore itis removed from themandrel of the, d

niachi-ne;

. Having t us fully sealed the iara- 2 what I claim as newand desire tosecure by Letters Patent,'is: 1 v w p 1. In a spring-winding 'machin'eof the'f class described, a frame, a removable mam of a spring that maybe woundfthere'on,

chine, and it will be observed that the memmeans-for releasingthe said'spring holding" means, rollers cooperating with the said to themandrel, tating the said ing device.

2. Ina device of and suitable means for 'ro-' members projecting fromthe sides of the saldv'mandrelfand means a mandrel, means projectingfrom the sides:

drel in the said-frame, mea'nsin the said I I the class describedyg,

within the said mandrelfor movingthe said T a p ng em ers toward Qliaway [from- 1; each other., I In a device of the character described,

of the said mandrel for holding the ends of a spring that may be woundthereon, means within the mandrel for moving the said holding membersbackward or forward, and means for removing the tips from one of thesaid holding members. i m

4. In a device of the class described, a suitable frame, a mandrelrotatably supported within the said frame, means for holding the ends ofthe mandrel whereby it may be readily removed, holding members projecting through slots in the said mandrel, means for moving the said holdingmembers toward or away from each other, suitable rollers cooperatingwith the said mandrel, and means for rotating the said mandrel androllers.

In testimony whereof I affix my signature.

ANDREW F. SMITH.

